Bug 881861: QuickShare should monitor installed app changes. [r=mfinkle]

mobile/android/base/widget/ActivityChooserModel.java

@@ -30,6 +30,11 @@ import android.text.TextUtils;
 import android.util.Log;
 import android.util.Xml;
 
+/**
+ * Mozilla: Extra imports.
+ */
+import android.content.pm.ApplicationInfo;
+
 /**
  * Mozilla: Unused import.
  */
@@ -257,6 +262,11 @@ public class ActivityChooserModel extends DataSetObservable {
      */
     //private final PackageMonitor mPackageMonitor = new DataModelPackageMonitor();
 
+    /**
+     * Mozilla: Count to monitor added and removed packages.
+     */
+    private int mApplicationsCount;
+
     /**
      * Context for accessing resources.
      */
@@ -732,6 +742,15 @@ public class ActivityChooserModel extends DataSetObservable {
      * @return Whether loading was performed.
      */
     private boolean loadActivitiesIfNeeded() {
+        /**
+         * Mozilla: Hack to find change in the installed/uninstalled applications.
+         */
+        List<ApplicationInfo> applications = mContext.getPackageManager().getInstalledApplications(0);
+        if (applications != null && applications.size() != mApplicationsCount) {
+            mApplicationsCount = applications.size();
+            mReloadActivities = true;
+        }
+
         if (mReloadActivities && mIntent != null) {
             mReloadActivities = false;
             mActivities.clear();